Have a line of threaded fittings spaced 80 mm apart on the Y axis, I want to use two of them as locating pins for 2 sided carving, am having trouble getting the stl to use the line on the y axis as center for the carve so that when I flip the piece over the carve is bang on the center line again.
IF you use the a side or corner as 0,0 and then Flip, you would want to use the opposite edge/corner as the new 0,0 datum after the flip, not the same location.